395 results about "Composite matrix" patented technology

There is described a biocompatible implant for the filling of a cavity in a living organism if such as, for example, a bone defect or an extraction wound, comprising an open porous scaffold and/or a composite matrix comprising a plurality of inorganic or synthetic granules and a synthetic polymer matrix, and further comprising a biodegradable membrane which is interconnectibly sealed to a surface portion of the scaffold or composite matrix such, that the scaffold or composite matrix and the membrane form a single piece of matter. In one embodiment, the implant is biodegradable.

Provided is a magnetic graphite nanoplatelet, and a method of manufacturing nanocomposites by introducing the magnetic nanoplatelets into a composite matrix. Expanded crystalline graphite, in the form of graphite nanoplatelets, is mixed with magnetic particles to adhere the particles to the nanoplatelets. The magnetic graphite nanoplatelets are combined with a composite matrix, typically a polymer, to form a nanocomposite. In the presence of an applied magnetic field, the magnetic graphite nanoplatelets orient and align consistent with the magnetic field to yield a composite having enhance mechanical, electrical and thermal properties

Polyimide copolymers were obtained containing 1,3-bis(3-aminophenoxy)benzene (APB) and other diamines and dianhydrides and terminating with the appropriate amount of reactive endcapper. The reactive endcappers studied include but should not be limited to 4-phenylethynyl phthalic anhydride (PEPA), 3-aminophenoxy-4'-phenylethynylbenzophenone (3-APEB), maleic anhydride (MA) and nadic anhydride (5-norbornene-2,3-dicarboxylic anhydride, NA). Homopolymers containing only other diamines and dianhydrides which are not processable under conditions described previously can be made processable by incorporating various amounts of APB, depending on the chemical structures of the diamines and dianhydrides used. By simply changing the ratio of APB to the other diamine in the polyimide backbone, a material with a unique combination of solubility, Tg, Tm, melt viscosity, toughness and elevated temperature mechanical properties can be prepared. The copolymers that result from using APB to enhance processability have a unique combination of properties that include low pressure processing (200 psi and below), long term melt stability (several hours at 300 DEG C. for the phenylethynyl terminated polymers), high toughness, improved solvent resistance, improved adhesive properties, and improved composite mechanical properties. These copolyimides are eminently suitable as adhesives, composite matrices, moldings, films and coatings.

Apparatus and methods according to various aspects of the present invention may operate in conjunction with composite matrix material and reinforcement material, such as nanostructures. The nanostructures may be evenly dispersed and/or aligned in the matrix material through application of an electromagnetic field, resulting in a nanocomposite material. In one embodiment, the nanocomposite material is suitable for large scale processing.

A process for producing a silicon:silicon oxide: lithium composite (SSLC) material useful as a negative electrode active material for non-aqueous battery cells includes: producing a partially lithiated SSLC material by way of mechanical mixing; subsequently producing a further prelithiated SSLC material by way of spontaneous lithiation procedure; and subsequently producing a delithiated SSLC material by way of reacting lithium silicide within the dispersed prelithiated SSLC material with organic solvent(s) to extract lithium from the prelithiated SSLC material, until reactivity of lithium silicide within the prelithiated SSLC material with the organic solvent(s) ceases. The delithiated SSLC material is a porous plastically deformable matrix having nano silicon embedded therein. The delithiated SSLC material can have a lithium silicide content of less than 0.5% by weight. A battery cell having as its negative electrode active material an SSLC material as set forth herein can exhibit an irreversible capacity loss of less than 10%.

A composite matrix yarn (Y) including a cover yarn (80) formed of a plurality of twisted fibers, a core strand (70) positioned within the cover yarn (80) and around which the fibers of the cover yarn (80) are twisted to provide mechanical adhesion between the cover yarn (80) and the core strand (70), and an adhesive binder (75) carried on the core strand (70) for providing enhanced adhesion between the core strand (70) and the cover yarn (80).

Self-polymerization of mono-aziridine (or azetidine) and multi-aziridine (or azetidine) containing compounds with vinyl group containing organic acid, such as acrylic acid (AA), 2-methylenesuccinic acid, 2,3-dimethylenesuccinic acid and etc, at ambient temperature results in the new type of cross-linked and linear type copolymers, respectively.

The polymerization of multi-functional aziridine (or azetidine) containing compounds with vinyl group containing organic acid results in the formation of high cross-linked polymers. The self-polymerization takes place at ambient temperature and the resultants, cross-linked polymeric networked materials, are solvent insoluble and potential for adhesive, composite matrix and other applications. These insoluble materials are hydrolyzed in an acidic or basic condition to form the water soluble β-amino acids.

A linear poly(β-aminoester) is obtained from the self-polymerization of vinyl group containing organic acid with mono-aziridine (or azetidine) containing compound at ambient temperature. poly(β-aminoester) is applicable for gene transfer, controlled drug release and other applications. This self-polymerization process offers a convenient route for preparing poly(β-aminoesters).

The anterior composite matrix dental restoration system provides a matrix for holding a composite filling material in place as it cures, and a tool for holding the matrix in place during the curing of the filling material. The matrix comprises a thin, flat, flexible, and transparent sheet of plastic material with parallel tubular extensions on the opposite ends. The distal ends of the specialized forceps tool are inserted into the tubular ends of the matrix and used to install, hold, and remove the matrix. The relatively small and narrow tool greatly increases the comfort of both patient and dentist or dental technician by precluding need to insert and hold the fingers in the mouth of the patient to install, hold, and remove the matrix. The matrices may be provided in different sizes, with at least the tubular end components being optionally color coded to indicate the corresponding size.

The invention discloses preparation of a polylactic-co-glycolic acid (PLGA) nano-fiber scaffold and application of the PLGA nano-fiber scaffold to tissue engineering, and belongs to the field of the tissue engineering. The method comprises the following steps of: preparing a fiber film containing two materials by taking PLGA and polyvinylpyrrolidone (PVP) as a raw material through electrostatic blended spinning, and dissolving and removing the PVP in an aqueous solution to obtain the PLGA nano-fiber scaffold with certain microstructures. A cell/PLGA nano-fiber scaffold composite matrix is obtained by the following steps of: inoculating seed cells on the PLGA nano-fiber scaffold, culturing in vitro, folding a cell/PLGA nano-fiber scaffold composite, and culturing for 7 to 14 days in a spinner cultivation mode. The composite matrix can be taken as a tissue engineering material with a specific tissue repair function and implanted into an animal model. The preparation process is simple and feasible, is high in repeatability, and can be widely applied to the field of the tissue engineering.

In a method of wireless transmission, space time matrices are used to spread the transmission of data over two or more transmit antennas and/or over two or more symbol intervals. Initially, blocks of data are encoded as symbols, each being a complex amplitude selected from a symbol constellation. A finite set of space-time matrices, referred to as "dispersion matrices," is predetermined. In transmission, a group of symbols are transmitted concurrently. Each of the symbols to be transmitted is multiplied by a respective dispersion matrix. Thus, a composite matrix, proportional to a sum of dispersion matrices multiplied by their corresponding symbols, is modulated onto a carrier and transmitted. In reception, knowledge of the dispersion matrices is used to recover the transmitted symbols from the received signals corresponding to the composite matrix that was transmitted.

The invention discloses a composite matrix based carrier modified asphalt self-adhesive waterproof coiled material, which is composed of three parts. Specifically, the first part is an HDPE film carrier, the second part is a high polymer modified asphalt self-adhesive glue film coating, and the third part is a low-alkaline glass fiber mesh cloth embedded and fixed in a high polymer modified asphalt self-adhesive material. The three parts are sticked and compounded together by the high polymer modified asphalt self-adhesive glue film coating to form the waterproof coiled material. The composite matrix based carrier modified asphalt self-adhesive waterproof coiled material disclosed in the invention can be made into an efficient waterproof material on the basis of maximumly reducing natural resource consumption, thus providing safety guarantee for engineering waterproofing.

The invention relates to composites having increased distortional deformation, and/or decreased dilatation load, as expressed within the von Mises strain relationship, which provide increased von Mises strain results. These composites may provide enhanced composite mechanical performances.

The present invention is particularly, but not exclusively, useful for reducing wear of component parts of impact-type rock-crushing machines caused by earth aggregate flows during operation of impact crushers. The present invention includes a central feed body and impeller shoe that has hard material insert bars fixed therein to reduce wear. The exposed top surface of the central feed body and front face of the impeller shoe are impregnated with a plurality of cemented carbide insert bars. The cemented carbide insert bars form an upper composite matrix that helps to reduce wear and the premature wash out of the hard material insert bars integrally cast within the central feed body.

The present invention provides a composite matrix material which has (a) polyurethane; (b) inorganic particles which have outer surfaces and an aspect ratio of from at least about 1.5 to about 30; and (c) a silane coupling agent; wherein at least a portion of outer surfaces of the inorganic particles are in contact with the silane coupling agent. Also provided is a composite in which a composite matrix material is a polymeric matrix core which has a surface, and a thermoset layer is bonded to at least a portion of the surface of the polymeric matrix core. The composite is a high strength, durable part that may be used, for example, in manufacturing pallets and building or construction materials such as deck boards and siding and roofing panels, etc.

A system and method for removing unwanted heat generated by a piezoelectric element of an ultrasound transducer. Some implementations have high thermal conductivity (HTC) material placed adjacent to the piezoelectric element. The HTC material can be thermally coupled to one or more heat sinks. Use of HTC material in conjunction with these piezoelectric element surfaces is managed to avoid degradation of propagating acoustic energy. Use of the HTC material in conjunction with heat sinks allows for creation of thermal paths away from the piezoelectric element. Active cooling of the heat sinks with water or air can further draw heat from the piezoelectric element. Further implementations form a composite matrix of thermally conductive material or interleave thermally conductive layers with piezoelectric material.

The present disclosure relates to ground expanded graphite agglomerate compositions, methods for making such agglomerates, their use as conductive additive, and conductive composites comprising such ground expanded graphite agglomerates. The disclosure also pertains to methods for making such composites and the use of such composites in preparing thermally conductive materials. The agglomerates are characterized by a certain softness allowing the agglomerates to dissolve, e.g., through shear forces applied during compounding, thereby leading to an improved feedability and a highly homogenous distribution of the expanded graphite material in the composite matrix.